Authorities in Iowa County say one person was critically injured after crashing into a school bus Thursday morning. A report says no children were on the bus at the time of the crash.The crash happened just before 8 a.m. on County Highway F in Moscow Township in rural Iowa County, with multiple people calling 911 after seeing the crash. The Iowa County Sheriff’s Office says its initial investigation indicates the driver of a car headed south on Highway F was speeding when they lost control of the car and hit the school bus in a head-on collision. The driver of the car was flown to UW Hospital in Madison via Med Flight with critical injuries, while the driver of the bus was taken to Upland Hills in Dodgeville. The extent of the bus driver’s injuries were unknown.